Automatically-reclosing circuit-breaker mechanism.



E. C. RANEY. AUTOMATICALLY RECLOSING CIRCUIT BREAKER MECHANISM. APPLICATION FILED ocr .12. ms.

1,302,851. Patented May 6, 1919;

4 SHEETS-4H! I.

E. C. RANEY. AUTOMATICALLY RECLOSING CIRCUIT BREAKER MECHANISM.

Patented Miiy 6, 1919. 4 SHEEIS-1SHEET 2.

I APPLICAHOH FILED OCT: I2. l9l5.

' 'E. C. BANE-Y. AUTOMATICALLYRECLOSIN G vCIRCUIT BREAKER MECHANISM.

APPLICATION FILED qcr. III-ISIS.

1,302,851. Patented Mu mmm Le. RANEYy I AUTOMATICALLY HECLOSING CIRCUIT BREAKER MECHANISM. v

APPLICATION FILED OC T- l2. IBIS. I 1,302, 51 Patented May 6, 1919.

4 SHEETS-SHEET!- 1T0 all whom it may concem;

l of sue 1 breakers to feeders of a load circuit which 1s suppliedby current at nmre than matically adapt itself to operate properly 45 wignate.corresponding p trts and wherein the d i agra mm etic orieIoE.

"tenement, or commune, onrofassrcnon To run oromnrro-nncrloamo oiaoorr nnnmncomranr, orconmaeus, onto. A cozerommon or 01110;

nuromncaur-nncnosme swoon-enema mnonamsn l3e it known that I, Es'rnnna (1. Hawaii, a c t zenofthe United States of Ainerimi, re siding at Columbus, in the county of Frank 5 3 lin and State of Ohio, have inventedcertain new and useful Improvements in Autoinati cally-Reclosing Oirc'suit-Breaker Mechanism, user which thefollowing is a. specification.

My invention relates automatically reclosin circuit breakers In the application j, "one point such as a fee'pli to e trolley line :which ie supplied by, c rrent from two or more stations, there are distinct condi tions under each ofvihi'ch the automatic 'reclosing circuit breake' must function propm I a v First: When the b aker opens due to' ii'a local overload whic not cause all the breakers in the other feeders to open. In. thiscaoea potential will e. at on the load side of+ the open breaker... This potential =1 may'very invalue from a fewvolts 'npi to normal value. u cloe'ure of the breaker must be governed in 1 accordance with this potential to preventthe 'recloeure of, the breaker untilthe overload has'been removed to a safe value. Second 2 When the breakers on all feeders 1 to a common load circui short circuitlor when a ions except one Wareshut down,the reclos ng, of the breaker ihust be with the value oft that the breaker. will not reclose until the lohort circuit has been removed or the load governed in accordance resietance'increased to a safe limit;

It isthe purpose of the present invention to provide a circuit breaker which will autounder either 0 the conditions'cited above. The referred embodimentfiof my inventionis sqlown in the accompanyin drawings .wherein similar characters of re erence (les- Specification ct Ilettcrs Patent.

1 Application nlcd October 1%, 1915. Serial No. 56,415.

breakers which are identical in structure;

Under thiscondition the re bpened to permit drop open upon overload pr short circuit.

are opened by v a e load resistancein such a manner Patentedlllay 6, 19 9- lfall the breakers being closed.

Fig. 3 is a die ram showing one of-the breakers open an the other closed. Fig. 4 a diagram showing all of the ltn'eakers o Jen.

In the :rawingsthe two feeder cirouits may be designated A and? B j The load circuit comprises: the wires 1 and 2. The feed wires of station .A are desi ated 3 and .sl while feeder wires of station are deeig hated 5 and 6. At station A and at station B are located automatically recloeing circuit tial'eleinehts of the appardtus shown ill Fig.

Therefore. descri tion of oneof thesecir cult breakers wil be sufiicient to clearly demonstrate the nature ofboth.

Each breaker h 'e a mamT/L'ontact member 7' movable into closedposition by a. ivoted. lever 8 which is under the control 0 core of a lifting coil 10.' Thephmger 9 ofthe 7 lifting coil 10 carries, a ateral extension adapted when'raised to lift and thereby open-n v a dashpot switch-11 whichwouldotherwise I bridge 0(I'JIltaCtS'12"8nd13.' i l v -"The, circuit of coil 10 is designed to be the contact member 7 to by a switch men'iber through the nedium f an overload coil 14. Whenthi l i 15fis opened it is automaticall as and held open by a latch y gr i ,R colosure of the must be efi'eotedl b closingthe circuit of the lifting coil10.

his is acoom lished byithe trip c'oil'1s17 t which is opera le undercertainlprescribed conditions to trip the latch 16 and thuslre lease the switch lo. Y t Thecircuit of, trip coil .17 is under fthe controlof-coil 37 ande; compound coil- I ill-29 which automatically adapt the circuits; of any apparatus, to either the or second condition named above as such conditions exist or. arise. The manner in 1 which this-is efl'ectedmaybestxbe described in the operation 'which follows. i The operation of my device may. setforth with reference to Figs-2, 3 and 4 or the drawings. i l l l j k In Fig. :2, with special reference to station A; the main contact bridge is closed and will be maintained'in the closed pbsii tion in normal operation by the actionof a,

venergized by. current from generator Qhrough wire 49, series coil 14, wire 45, re-

. sis'tance 46, contact 47, contact arm 15, Wire 48, coil to wire 3, completing. the circuit to the generator.

In case of an excessive flow. of current through series co1l'14of the circuit breaker,

the core of coil 14; will be raised and operate on extension at contact 15 causing its rotation-out of contact with point 47. This action deenergizes coil 10, rcsultin in the opening of the circuitbreaker in w ich the parts assume the position shown In Fig. 3.

It' will be noted that at theinstant contact arm 15 is opened by the core of overloadcoil 14 a latch 16 engages arm 15 in sucha manneras to holdarm 15 out of contact-with point 47. The reclosure of the circuit breaker can now be effected only by the operation of coil 17 on latch 16 to release contact 15 so that it will then engage contact point 47.

Fig. 3 illustrates conditions of, operation when the circuit breaker atstation A has opened antl when one or more other feeders are still supplying current to the load circuits 1 and 2.

' Fig. 4 illustrates conditions of operation when all at the circuitbreakers have opened. -The operation of coil 17 is governed by three difierent elements. First, the dashypotabridge i11nfiiintains the circuit of coil 7 Op at Points 12 and 13 for a defimt time interval, after the circuit breakers 1 open.. After circuit'jhas been completed at points 12 and 13 theiie are twocoils, namely,

l-ooil 37 "and @ompound -c0il 312 '9,. either 3 of which coils maycontrol the completion of circu itqofcoil 17. station A to have opened due to overload Assuming thebreaker at I 'while'thegfieakef at station B still remains closed, ins-s ation of load wires 1 and .2, 00i1'31 Will .to wire 30, to 'wire 4, to wire-2, thence 5o through load or short circuit to wire 1 and 115 3 1 and Win32- own in Fig. 3, causing the enerenergized through wire 4, wire 30, coil .jIhe core of coil 31 is so constructed that allow potential" between wires 1 and 2' will energize it sufieiently to maintain contact bri there is more than a .few volts potential on ,the l ne after one breaker has opened, these bridges are maintained in the open or raised 50 position. .'-'Under this condition the energr- .tion}of coil 37 nation of coil 17 is governed bythe operaon' core 38 to connect points 'and 36 by means of bridge 39. With the at Q ' breaker in the 13 and 12 to circuit thus wire 42- to point '19.

cs 26 and '22 open between points "27-425 and 2321 respectively. Thus, when wire 3. However, resistance between coil 37 is subjected to the full potential of load circuits 1 and 2 as follows: From wire 2, through Wire 4, through wire 30, through coil 37, through wire to contact points wire 3. I

Coil 3,7 is preferably designed so that it may be set to operate on any desired line, potential between of normal value and full potential. It is obvious that it would be undesirable for a breaker to reclose so long as an overload existed opposite snch breaker which would cause its immediate opening, if it were to close. 'The desirable load potential for the operation of coil 37 governed. by local conditions and it is 89 will be therefore desirable that the coil 37 be readily adjustable for any desired point of operation.

At the instant the potential between wires 1 and 2 increases to the point for which the operation of coil 37 is adjusted, bridge 39 will closecontact points 35 and 36. A- current will then flow from through wire 50 'to resistance 18, wire 34,

contact bridge 39, wire24, wire 41, through coil '17, contact points'13 and 12 to wire 3. This current will energize coil 17 to release latch 16 whichin turn allowscontact arm 15 to complete the circuit of coil 10, resulting in the reclosure of the circuit breaker.

The reclosure of the breaker opens the circlfit between points 13 and 12 and all parts resume the position shown in Fig. 2.

The second condition of the operation of the trip coil 17 is illustrated diagrammatically in Fig. 4 in. which case all feeder breakers to the load circuit wires 1 and 2 have been opened with the result that relay coil 31 isdeenergized allowing contact.

bridges 26 and 22 to --close the circuit between points 25-27 and 2l23. With the established, a limited current is shunted around the open br aker from generator A through wire 5%.. resistance 18,

through wire 1 to wire 3 returning to generator station A. .The other circuitfrom point 19 is through bridge member-22, wire 511, coil 17, through bridge, 11 to Wire 3. So

long asthe short circuit exists at point 0,

Fig.4, or a load of ex'tremclv low resistance is connected between wires 1 and 2, the.

greater part of current through resistance 18 will be shunted through the load circuit,

wire 4, wire2, short circuit a to wire 1, to

by way of-bridge 26, wire 28', coil29, wire 30,128

wires 2' and 1, agreater portion'of the current will be diverted to p the other circuit, through bridge 22, Wire 13! generator A- from whence'tw par- L 11 With an increase of load 41, coil 17, bridge 11 a) wire a. When the circuit breaker.

resistance has reached a suflieiently hi h value, enough currentwill flow through t e last named circuit to operate coil 17 and re lease latch 16 with the result'of closing the From the-description, it"w ill be, apparent thatI have provided a circuit breaker which will-iopenin case of an overload or maticall whenever the potential of .load cirshort :circuit, and which will reclose autocuit is high enough to preclude an excessive e flow of current from the feeder whose breaker is open, or whenever the load resistance is of, sufliciently highvalue to prevent an excessive flow of current.

Having thus described my invention, what I claim 15:

' 1, A eircuitbreaker com rising means for openinthe =circuit brea er on overload,

means r the circuit breaker, and means operative w operative when there'is less than said minimum potential 'to vgovern operation of said reclosing means in accordancewlthload re-. sistancew i p 2.}. itchit breaker comprising means I for opening'the circuit breaker on overload,

means operative when there ismore than a means, for. reclosing the circuit breaker,

definite minimum potential in the load circuit to govern operation of said reclosingmeans by'potential of the load circuit and preclude reclosing until a definite higher potential is exceeded,- and means operative p when there is less than said minimum po- 'means above a predetermined hi h voltage voltage has dropped below a predetermined tential to govern operation of said reclosing 40 a means in accordance 'w-ith load resistance;

3. A circuit breaker com rising means for opening the circuit brea er. on overload, means for reclosing the circuit breaker, means operative by substantially normal potential of the load circuit to connect said toclosing means to the source of supply, and means operative to connectsaid reclosing, means to the source of suppl only after the otential of the load circuit as dropped bee. ow a predetermined minimum. p

4; circuit breaker comprising means for opening the circuit breaker on overload, means for reclosing the circuit breaker, means operative by substantially normal potential 0f the load circuit to connect said reclosing means to the source of supply, and means operative to connect said reclosing means to the source of supply only after the pgtential of the load circuit has dropped low a predetermined minimum, said means hei'nf disconnected whenever the potential of the oad circuit rises to substantially mor mal value. i y

5. A circuit breaker com rising means for opening the circuitbrea or on overload, means for reclosing th'e circuit breaker, means for causing actuation of the reclosing point, by which connections sai reclosing means are actuated abovea predetermined low' voltage complete sai connections only when said voltage. a

' In testimony'whereof-I hereby affirniy ESTELLEC. RA'N'EY} signature.

point, and means'operative to a. l 

